| 12345678910111213141516171819202122232425262728293031323334353637383940 |
- from flask import Flask, render_template, Response
- import cv2
- class VideoCamera(object):
- def __init__(self):
- # 通过opencv获取实时视频流
- self.video = cv2.VideoCapture(0)
- def __del__(self):
- self.video.release()
- def get_frame(self):
- success, image = self.video.read()
- # 在这里处理视频帧
- cv2.putText(image, "hello", (10, 30),
- cv2.FONT_HERSHEY_SIMPLEX, 0.8, (0, 255, 0))
- # 因为opencv读取的图片并非jpeg格式,因此要用motion JPEG模式需要先将图片转码成jpg格式图片
- ret, jpeg = cv2.imencode('.jpg', image)
- return jpeg.tobytes()
- app = Flask(__name__, static_folder='./static') @ app.route('/')
- # 主页
- def index():
- # jinja2模板,具体格式保存在index.html文件中
- return render_template('index.html')
- def gen(camera):
- while True:
- frame = camera.get_frame()
- # 使用generator函数输出视频流, 每次请求输出的content类型是image/jpeg
- yield (b'--frame\r\n' b'Content-Type: image/jpeg\r\n\r\n' + frame + b'\r\n\r\n') @ app.route('/video_feed')
- # 这个地址返回视频流响应
- def video_feed():
- return Response(gen(VideoCamera()), mimetype='multipart/x-mixed-replace; boundary=frame')
- if __name__ == '__main__':
- app.run(host='0.0.0.0', debug=True, port=5000)
|